Chengdu Ebyte Electronic Technology Co.,Ltd E07-900M10S User
Manual
Copyright ©2012–2021,Chengdu Ebyte Electronic Technology Co.,Ltd.
parts with large electromagnetic interference;
Bottom Layer High-frequency digital routing, high-frequency analog routing, and power routing must be avoided
under the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer,
and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital
part of the module and routed in the Bottom Layer;
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer
or other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;
It is assumed that there are devices with large electromagnetic interference around the module that will greatly
affect the performance. It is recommended to keep them away from the module according to the strength of the
interference. If necessary, appropriate isolation and shielding can be done;
Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,
power traces) around the module that will greatly affect the performance of the module. It is recommended to stay
away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding
can be done;
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is
still a risk of damage);
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good
antenna extension cable to extend the antenna to the outside;
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
weakened.
4.2 Programming
It can complete the wireless data transceiving by operating its control register and transceiving buffer. Please refer
to the latest CC1101 data sheet for the timing operation of module register.
GDO0 is a general purpose I/O port,see CC1101 user manual;
GDO2 is generally configured as an IRQ-like function, or not connected. SPI query mode can be used to obtain the
interrupt status, but it is still recommended to use external interrupt by connecting to a MCU;
After CC1101 restores IDLE mode or configured as sleep mode, it is recommended to reinitialize the power
configuration table.